Thank you for your question. If your faucet was installed prior to 2006, you can use any 1300/1400 series trim to upgrade your faucet. You will need to keep your old cartridge and not use the new cartridge that comes with the new trim. If it needs to be replaced, the cartridge number is RP19804.
If you have a valve that was installed after 2006, it will probably be our Multi-choice R10000-UNBX. If this is the case, you are able to switch out your trim with any 1300/1400 and 1700 series. You will use the cartridge that comes with your new trim if you have the multi-choice valve.